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Finding the Fourth Proportional to 5,321.25, 7,981.88 and 1,673.25

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Solution

The fourth proportional to 5,321.25, 7,981.88 and 1,673.25 is: 2,509.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.25 : 7,981.88 = 1,673.25 : x
  2. Step 2: Convert to fraction form
    5,321.25/7,981.88 = 1,673.25/x
  3. Step 3: Cross multiply
    5,321.25x = 7,981.88 × 1,673.25
  4. Step 4: Simplify right side
    5,321.25x = 13,355,680.71
  5. Step 5: Solve for x
    x = 13,355,680.71/5,321.25
  6. Step 6: Final answer
    x = 2,509.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.